Machine for drawing sharp edges on metallic bodies.



H. P. HANSON. MACHINE r03 DRAWING SHARP Evens 0N METALLIC BODIES. APPLICATION FILED 11017.22, 1911.

1,031,549 Patented July 2, 1912 2 6 4 Q a M 13 L E W ByM/EZZZiZZZ 'I- COLUMBIA FLANOORAPH 60.. WASHINGTON. n. C.

HANS P. HANSON, OF MILAN, MINNESOTA.

MACHINE FOR DRAWING SHARP EDGES ON METALLIC BODIES.

Specification of Letters Patent.

Application filed November 22, 1911.

Patented July 2, 1912.

Serial No. 661,824.

To all whom it may concern:

Be it known that I, HANS P. HANSON, a citizen of the United States, residing at Milan, in the county of Chippewa and State of Minnesota, have invented certain new and useful Improvements in Machines for Drawing Sharp Edges on Metallic Bodies; and I do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention has for its object to provide an improved device for drawing sharp edges on metallic bodies, such as plow shares and the disks of disk plows, disk drills and the like, and-is in the nature of an improvement on the device disclosed and claimed in Letters Patent of the United States, No. 986,820, issued March the 14th, 1911, to Charles 0. I-Ialling and entitled machine for drawing sharp edges on metallic bodies.

To the above end the invention consists of the novel devices and combinations of devices hereinafterdescribed and defined in the claims.

The invention is illustrated in the accompanying drawings wherein like characters indicate like parts throughout the several views.

Referring to the drawings,-Figure 1 is a side elevation, with some parts broken away, showing the improved device; Fig. 2 is a plan view of a portion of the improved device, as shown in Fig. 1, with some parts broken away and the exposed parts shown in section; and Fig. 3 is a view principally in longitudinal vertical section taken on the line a x of Fig. 2, with some parts shown in full.

The numeral 1 indicates a metallic base which at one end is provided with a pair of laterally spaced shaft bearings 2 and, near its other end, is provided with a pair of laterally spaced standards 3. In the bear- .ings 2 is journaled a crank shaft 4 which, as

shown, is provided with a pulley 5 and a fly wheel 6. Resting upon the forward portion of the base 1, is an anvil block 7, the upper portion of which is beveled, preferably from its center toward the outer end portion. A set screw 8 has screw threaded engagement with the lower portion of one of the standards 3, impinges upon the anvil block 7 and securely holds the same to the base'l, which permits the said anvil block 7 to be adjusted in a direction longitudinal of the said base.

Pivoted on a bolt 9, passed through the upper portions of the standards 3, is a strong depending link 10. The intermediate portion of the bolt 9 between the standards 3, which forms the bearing for the upper end of the link 10, is provided with an integrally formed eccentric 11, as best shown in Fig. 3. Rigidly but detachably secured to one of the projecting ends of the bolt 9, is a horizontally extended and rearwardly projecting arm 12. The free end of the arm 12 is connected to the base 1 by means of a tightly coiled spring 13 and which spring normally holds the arm 12 in a predetermined set position and acts as a stop to limit the downward movement thereof.

Journaled at its rear end to the central crank portion of the crank shaft 4, is a long crank bar 14. The forward end of this crank bar 14 is bifurcated at 15 and is pivotally attached by a pin or bolt 16 to the lower depending end of the link 10 and which link projects between the prongs thereof. A roller 17 is placed between the ends of the prongs 15 and is journaled thereto by means of a pin 18. Preferably, both the, roller 17 and the anvil block 7 are of hardened steel. The relation of the parts described is such that when the crank bar 14 is moved rearward, under the rotation of the crank shaft 4, and a vibratory move ment is imparted to the depending link 10, the roller 17 will be moved rearward and slightly downward or near to the upper surface of the underlying portion of the anvil block 7. Obviously, when the crank bar 14 is moved forward, the said roller will be moved farther away from the anvil block 7.

In the use of the device to sharpen or draw out theedge of a plow share, disk or other thin body 19, as shown in Fig. 3, the said body is preferably first brought to a red heat and is then placed on the anvil block .7 under the roller 17, so that under each rearward and downward movement of the roller 17, the edge of the said plow share, disk or other body 19 will be drawn out to a sharp edge. By moving the plow share, or other body which is to be drawn out or sharpened, transversely of the anvil block 7, at the proper rate of speed, the entire edge thereof will be drawn out and brought to a sharp edge.

During the sharpening of the plow share, disk or other body, if the roller 17 engages a portion thereof that is of unusual thickness or that has not been properly heated, the eccentric 11 will rotate, with respect to the link 10 against the tension of the spring 13, under the lifting action of the roller 17 By thus permitting the several parts of the machine to yield under excessive pressure on the roller 17, the machine will not be broken or damaged. It is, of course, obvious that by changing the position of the eccentric 11 with respect to the link 10, the pressure on the roller 17 required to rotate said eccentric may be varied, at will. This adjustment of the eccentric may be accomplished either by changing the position of the arm 12 on the bolt 9, or by varying the length of the spring 13.

The term drawing head is herein used ina broad sense to cover any kind of a die.

What I claim is 1. In a device of the kind described, the combination with a suitable anvil, of a support rigidly secured in respect to said anvil, a bar connected near its free end to said support, with freedom for a limited endwise movement and provided at its short end with a drawing head cooperating with said anvil, means for reciprocating said bar, and means for permitting said drawing head to yield in respect to said anvil under excessive strains, substantially as described.

2. In a device of the kind described, the combination with a suitable anvil, of a support, a bar connected to said support with freedom for a limited endwise movement and provided with a drawing head for cooperation with said anvil, means for reciprocating said bar, and means permitting a yielding action between said drawing head and said anvil under excessive strains.

3. In a device of the kind described, the combination with a suitable anvil, of a support rigidly secured in respect to said anvil, a bar connected near its free end to said support, with freedom for a limited endwise movement and provided at its short end with a drawing head cooperating with said anvil, means for reciprocating said bar, and means including a yielding eccentric for permitting said drawing head to yield in respect to said anvil under excessive strains, substantially as described.

4. In a device of the kind described, the combination with a suitable anvil, of a support rigidly secured in respect to said anvil, a bar connected near its free end to said support, with freedom for a limited endwise movement and provided at its short end with a drawing head cooperating with said anvil, means for reciprocating said bar, a yielding eccentric for permitting said drawing head to yield in respect to said anvil under excessive strains, and means for adjustably setting said eccentric in different normal positions, substantially as described.

5. In a device of the kind described, the combination with a suitable anvil, of a link support rigidly secured in respect to said anvil, a vibratory link, an arm equipped eccentric, pivotally connecting said link to said support, a spring operative on the arm of said eccentric for normally holding said eccentric in a predetermined position, a bar pivotally attached to said link near its free end and provided at its short end with a drawing head cooperating with said anvil,

and means for reciprocating the said bar, 7

the said eccentric permitting the drawing head to yield in respect to the anvil under excessive'strains, substantially as described.

6. In a device of the kind described, the combination with a suitable anvil, of a link support rigidly secured in respect to said anvil, a vibratory link, an eccentric pivotally connecting said link to said support, an

arm adjustably secured to said eccentric, a

spring operative on the said arm for normally holding said eccentric in a predetermined posit-ion, a bar pivotally attached to said link near its free end and provided at its short end with a drawing head cooperatlng with said anvll, and means for reclproeating the said bar, the said eccentric permitting the drawing head to yield in respect to the anvil under excessive strains, substantially as described.

In testimony whereof I afiix my signature in presence of two witnesses.

HANS P. HANSON. Witnesses:

SIGURD HAGEN, OsGAR S. WVILsoN.

Copies of this patent may be obtained for five cents each, by. addressing the Commissioner of Patents,

Washington, D. C. 

